Packing for piston-rods.



G. F. ROYER & L. P. ZWEI'BEL.

PACKING FOR PISTON RODS.

APPLICATION FILED JULY 10, 1907 Patented Dec. 6, 1910.

awn cutout 5 iwi/44 aooo UNITED STATES PATENT OFFICE.

GEORGE F. ROYER AND LEWIS F. ZWEIBEL, 0F WILKES-BARBIE, PENNSYLVANIA.

I PACKING FOR PISTON-RODS.

To all whom it may concern:

Be it known that we, Gnoncn F. Roma and LEwIs F. ZWEIBEL, citizens ofthe United States, and residents of \Vilkes- Barre, Luzerne county,State of Pennsylvania, have invented certain new and useful-Improvements in Packing for Piston-Rods, &c., of which the following isa specification.

The present invention relates'to improvements in packings for pistonrods, etc, and has for its object to provide a packing, which may beused in any stutfing box adapted to receive soft packing withoutrequiring the use of springs or other means to hold it in properposition and which will possess sufficient elasticity to compensate forthe wear 90%, asbestos fiber or fuzz 6%, flake graphite 4 0.

Experience has shown that for use with piston rodswhere the pressure ofsteam or air is not constant, the best results are obtained when theproportion of metal is increased and that of asbestos decreased. Where acontinuous or constant pressure is experienced, the best results areobtained, when the proportion of asbestos is increased and thereby thepacking is made more dense.

The metal employed in the packing is as before stated of flake form,being preferably cast in thin flakes and the asbestos fiber or fuzz actsto bind such flakes together and give the packing the desireddensitywithout crushing the metal flakes, by excessive pressure on thegland which holds the packmg in place in the stuffing box.

It will beunderstood that the packing is :to be inserted in the stuflingbox the same manner as the soft fibrous packing commonly employed and itwill be sufficiently elastic Specification of Letters Patent. PatentedDec; 6, 1910, Application filed July 10, 1907.

Serial No. 383,Q93.

to maintain itself in properposition without requiring the-use ofsprings'or other following means. \Vhile aflording a sufliciently densepacking the metal flakes are not undesirably compacted into a solid massbut each is left relatively free so that there will "[be a propersurface adjacent the moving parts. The graphite acts to sion of themetal flakes.

\Vhile as before stated the packing is particularly adapted-for use withpiston rods, it may be advantageously employed in other connections andin fact for any form of valve or similar device where it is desired toefl'ect the closing of a passage against air or steam.

\Ve are aware that it has been heretofore proposed to employ a loosemass or body of fibrous mineral as the medium for conducting lubricantto a surface requiring lubrication, as for instance in car axle boxes orjournal bearings; and also to' employ for the same purpose a mixture ofcotton waste prevent corroand metal particles. All of such so called Ipackings however are radically different from this invention, theprimary purpose of which is to prevent the passage of fluid even underpressure through a stufling box.

As hereinbefore pointed out the packing herein described is superior topackings heretofore employed or proposed for use in the same relations,or under the same conditions that it is subjected to. It can be readilyapplied to any stufling box, whereas the packings for similar useheretofore suggested or used have been specially molded or otherwiseconstructed so that they were only adapted for use with stufling boxesof some particular shape and size. The softmetal flakes when compressedby a gland or nut interlock one with the other and act to make aperfectseal about a valve stem or movable part of machinery. The asbestos fiberincreases the density of the packing and prevents the percolation offluid therethrough, while the graphite prevents corrosion and preservesthe packing in proper condition indefinitely.

Having thus described the invention what is claimed and desired to besecured by Letters-Patent is,

1. The herein described packing, for preventing the escape of fluidunder pressure around piston rods, valve stems or moving parts ofmachinery, consisting of a loose fibrous mass of asbestos fiber and softmetal flakes, which can be readily packed into any stuflin g box orjoint.

The herein described packing, for preventing the escape of fluid underpressure around piston rods, valve stems or moving parts of machinery,consisting of a nonmolded mass of asbestos fiber, soft metal flakes andgraphite.

3. The herein described packing, for preventing the escape of fluidunder pressure around piston rods, valve stems ormoving parts ofmachinery, consisting of flake 'metal,

asbestos fiber and graphite mixed in such proportion that the fiberconstitutes about 15 GEORGE F. ROYER. LEWIS F. ZWVEIBEL.

Witnesses:

EDWARD N. NoLL, JOHN J. ODoNNELL.

